clank (adj) - the opposite of ratchet. (ratchet can mean many things, such as ghetto, nasty, or annoying as hell) the main difference is that "clank" has a positive connotation and is used to acknowledge things as being smart, classy, cool, funny, appealing, etc.

Brittany: Did you see that girl's tribal-print shirt?
Tiffany: I did! That shirt was so clank.

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Matt: Dude, where'd you get those clank-ass shoes?
Tyler: My dad got them when he was in vacation in another country!
Matt: That's so awesome, man.

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Kevin: Hey Sheila, did you do the homework for Mrs. Smith?
Sheila: Nah, but she's really lenient and nice so I doubt she'll get mad at me.
Kevin: That's true, she's one of the clankiest teachers I know!